American psychologist Darcy Lockman investigates inequality of the distribution of tasks in the home. Once they have children, women add 22 hours of childcare, while men only add 14.

Women who work outside the home increase 65% of caregiving responsibilities of the children. Their male partners? 35%. We are witnessing what political scientists call “increasing and unsatisfied expectations,” something that historically gives rise to revolutions, but has not encouraged women to launch the ensuing civil revolution, says Lockman.